1 .. SPDX-License-Identifier: BSD-3-Clause
2 Copyright 2018 The DPDK contributors
4 ABI and API Deprecation
5 =======================
7 See the :doc:`guidelines document for details of the ABI policy </contributing/versioning>`.
8 API and ABI deprecation notices are to be posted here.
14 * linux: Linux kernel version 3.2 (which is the current minimum required
15 version for the DPDK) is not maintained anymore. Therefore the planned
16 minimum required kernel version for DPDK 19.02 will be the next oldest
17 Long Term Stable (LTS) version which is 3.16, but compatibility for
18 recent distribution kernels will be kept.
20 * kvargs: The function ``rte_kvargs_process`` will get a new parameter
21 for returning key match count. It will ease handling of no-match case.
23 * eal: both declaring and identifying devices will be streamlined in v18.11.
24 New functions will appear to query a specific port from buses, classes of
25 device and device drivers. Device declaration will be made coherent with the
26 new scheme of device identification.
27 As such, ``rte_devargs`` device representation will change.
29 - The enum ``rte_devtype`` was used to identify a bus and will disappear.
30 - Functions previously deprecated will change or disappear:
32 + ``rte_eal_devargs_type_count``
34 * pci: Several exposed functions are misnamed.
35 The following functions are deprecated starting from v17.11 and are replaced:
37 - ``eal_parse_pci_BDF`` replaced by ``rte_pci_addr_parse``
38 - ``eal_parse_pci_DomBDF`` replaced by ``rte_pci_addr_parse``
39 - ``rte_eal_compare_pci_addr`` replaced by ``rte_pci_addr_cmp``
41 * dpaa2: removal of ``rte_dpaa2_memsegs`` structure which has been replaced
42 by a pa-va search library. This structure was earlier being used for holding
43 memory segments used by dpaa2 driver for faster pa->va translation. This
44 structure would be made internal (or removed if all dependencies are cleared)
47 * mbuf: the macro ``RTE_MBUF_INDIRECT()`` will be removed in v18.08 or later and
48 replaced with ``RTE_MBUF_CLONED()`` which is already added in v18.05. As
49 ``EXT_ATTACHED_MBUF`` is newly introduced in v18.05, ``RTE_MBUF_INDIRECT()``
50 can no longer be mutually exclusive with ``RTE_MBUF_DIRECT()`` if the new
51 experimental API ``rte_pktmbuf_attach_extbuf()`` is used. Removal of the macro
52 is to fix this semantic inconsistency.
54 * ethdev: the legacy filter API, including
55 ``rte_eth_dev_filter_supported()``, ``rte_eth_dev_filter_ctrl()`` as well
56 as filter types MACVLAN, ETHERTYPE, FLEXIBLE, SYN, NTUPLE, TUNNEL, FDIR,
57 HASH and L2_TUNNEL, is superseded by the generic flow API (rte_flow) in
58 PMDs that implement the latter.
59 Target release for removal of the legacy API will be defined once most
60 PMDs have switched to rte_flow.
62 * ethdev: Maximum and minimum MTU values vary between hardware devices. In
63 hardware agnostic DPDK applications access to such information would allow
64 a more accurate way of validating and setting supported MTU values on a per
65 device basis rather than using a defined default for all devices. To
66 resolve this, the following members will be added to ``rte_eth_dev_info``.
67 Note: these can be added to fit a hole in the existing structure for amd64
68 but not for 32-bit, as such ABI change will occur as size of the structure
71 - Member ``uint16_t min_mtu`` the minimum MTU allowed.
72 - Member ``uint16_t max_mtu`` the maximum MTU allowed.
74 * security: New field ``uint64_t opaque_data`` is planned to be added into
75 ``rte_security_session`` structure. That would allow upper layer to easily
76 associate/de-associate some user defined data with the security session.
78 * cryptodev: several API and ABI changes are planned for rte_cryptodev
81 - The size and layout of ``rte_cryptodev_sym_session`` will change
82 to fix existing issues.
83 - The size and layout of ``rte_cryptodev_qp_conf`` and syntax of
84 ``rte_cryptodev_queue_pair_setup`` will change to to allow to use
85 two different mempools for crypto and device private sessions.
87 * crypto/aesni_mb: the minimum supported intel-ipsec-mb library version will be
88 changed from 0.49.0 to 0.52.0.